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Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTZoN3ctZmM4NC14N3A2

StaticFile.fromUrl can leak presence of a directory

Impact

StaticFile.fromUrl can leak the presence of a directory on a server when the URL scheme is not file://, and the URL points to a fetchable resource under its scheme and authority. The function returns F[None], indicating no resource, if url.getFile is a directory, without first checking the scheme or authority of the URL. If a URL connection to the scheme and URL would return a stream, and the path in the URL exists as a directory on the server, the presence of the directory on the server could be inferred from the 404 response. The contents and other metadata about the directory are not exposed.

This affects http4s versions:

Patches

The patch is available in the following versions:

Note: a previous version of this advisory incorrectly referred to 0.22.0-M9 and 0.23.0-M2.

Workarounds

Don't call StaticFile.fromUrl with non-file URLs.

For more information

If you have any questions or comments about this advisory:

Permalink: https://github.com/advisories/GHSA-6h7w-fc84-x7p6
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTZoN3ctZmM4NC14N3A2
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: over 3 years ago
Updated: almost 2 years ago


CVSS Score: 5.8
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

EPSS Percentage: 0.00095
EPSS Percentile: 0.41513

Identifiers: GHSA-6h7w-fc84-x7p6, CVE-2021-32643
References: Repository: https://github.com/http4s/http4s
Blast Radius: 1.0

Affected Packages

maven:org.http4s:http4s-core
Affected Version Ranges: >= 1.0.0-M1, <= 1.0.0-M22, = 0.23.0-M1, >= 0.22.0-M1, <= 0.22.0-M8, >= 0.21.7, < 0.21.24
Fixed in: 1.0.0-M23, 0.23.0-RC1, 0.22.0-RC1, 0.21.24